This page intentionally left blank MANUFACTURING PROCESSES (SECOND EDITION) H.N. Gupta B.Sc., G.I. Mech.E (London), FIE Visiting Professor Department of Mechanical Engineering I.E.T., Lucknow, U.P. Technical University R.C. Gupta B.Sc., B.E., M.Tech., Ph.D. Professor and Head Department of Mechanical Engineering I.E.T., Lucknow, U.P. Technical University Arun Mittal Senior Faculty Department of Mechanical Engineering I.E.T., Lucknow, U.P. Technical University Copyright © 2009, New Age International (P) Ltd., Publishers Published by New Age International (P) Ltd., Publishers All rights reserved. No part of this ebook may be reproduced in any form, by photostat, microfilm, xerography, or any other means, or incorporated into any information retrieval system, electronic or mechanical, without the written permission of the publisher. All inquiries should be emailed to
[email protected] ISBN (13) : 978-81-224-2844-5 PUBLISHING FOR ONE WORLD NEW AGE INTERNATIONAL (P) LIMITED, PUBLISHERS 4835/24, Ansari Road, Daryaganj, New Delhi - 110002 Visit us at www.newagepublishers.com Preface to the Second Edition The authors of the book ‘‘Manufacturing Processes’’ are thrilled at the speed with which the first edition of the book has been snapped up and exhausted within four months of its publication necessitating a reprint. This proves that the book has been found useful both by teachers and the students. This is extremely gratifying. It has been felt that to make the text of the book even more useful, certain changes have been made. Therefore the text of the Unit I and Unit IV has been completely rewritten in the second edition of the book.